Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

It's an Age Problem

There are 3 brothers, Andrew, Bernard, and Charlie. Bernard's age is \(12\) years older than Andrew. Five years ago, the ratio between Bernard and Charlie's age was \(2:3\). 4 years after now, Charlie's age will be \(3\) times of Andrew's age one year before. What is the sum of their ages, when Andrew's age is 17?

825278Their ages aren't integers6346

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations,
examples, and problems from the community.

Used and loved by 4 million people

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.